NOTES ON THE LIFE-HISTORIES OF NATAL TERMITES. 117 



that in the species, Calotermes flavicollis, the males 

 come out of the nest three to four hours before the females. 

 In the diiferent species of Termes the males and females 

 usually issue simultaneously. 



Mr. Haviland noticed that when some individuals were 

 placed in experimental tubes neoteinic^ forms were com- 

 menced. 



Mr. Haviland also remarked that the workers of this genus 

 are larval in appearance, and that " it is probable that all to 

 whom accidents do not happen eventually become winged 

 fertile individuals." 



Termes uatalensis Haviland. 



Termes natalensis is found in Natal, fi'om the sea-coast 

 to an altitude of about 4000 ft. 



The winged imago is about 1'9 mm. long, head-breadth 

 about 3'6 mm. 



There ai-e two sizes of soldiers and two of workers. 



The length of the large soldier is about 13 mm., head- 

 breadth 4'4 mm. ; small soldier is 8 mm. long, and head- 

 breadth 2"4 mm. ; large worker 6 mm. long, and head-breadth 

 2'6 mm. ; small worker 4*5 mm. long, and head-breadth 

 1'6 mm. 



The nests are covered by sub-conical mounds from 4-6 ft. 

 in height. The .sides meet the ground at very nearly a right 

 angle. The termites add continually to the height of the 

 n:iound; but they soon cease to add to the breadth of the base. 

 Inside the mound are wide, branching passages running 

 mostly in a vertical direction; they are sometimes 2 in. in 

 diameter and lead nearly to the surface of the mound. Some 

 communicate by small apertures with the exterior, but many 

 end blindly. It is probable that these large passages are for 

 the pnrpose of ventilation, and it is especially, or almost 



* Fertile individuals that have never liad wings capable of being used 

 for flight. 



